Balck magic (sorcery)

Balck magic (sorcery)Category: OtherBalck magic (sorcery)
Muhammad asked 2 years ago

Aslam alykum, 
My name is Muhammad and I am from Denmark. Recently i found a kind of post-it note, and to pairs of needles in My car. I took them out immediatly and, because i have heard about it before, that some person does this to another to harm them, and that it is Black magic. The note was under My back seat, on there was ritten something in danish, and the needles were crossed. I dont know if it is balck magic or not, because it is ritten in danish
My question is, that what should i do now? And is it possible to find out Who it was?
Jazakallah khair.